Ali Bahari – Portfolio for Projects

BreathPod

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BreathPod

Key Functions:

• Accurately measure CO₂ and track the volume of the breath
• Wirelessly communicate with the BreathPod App
• Ensure minimal contact with the breath flow (infection control)
• Support both battery and wired power

Key Design Requirements for PCB: LP502030, Pressure, CO₂, Controller, Battery

Design Process: Utilizes the Nrf52840 + BLE Bluetooth Module Microcontroller.

Key Design Requirements:

• Direct the flow of breath either towards the exhaust or sample cartridge with a signal from the micro-controller
• Have minimal contact with breath (infection control)

Design Process: Incorporates PTFE* Magnet Cylinders, Actuator, and Magnet.

*PTFE: Polytetrafluoroethylene

Additional Requirement: Must protect the samples from mechanical shock and temperature change.

Key Design Requirements:

• Prevent any substances from entering or exiting the sample tubes
• Be easy to assemble and disassemble (usability requirement)

Design Process: Utilizes *polymethyl methacrylate

A portable, modular coagulometer integrating a micro-electrode array for precise droplet manipulation, a feedback-based circuit for accurate clot detection, a temperature-regulated reaction chamber, and a sealed fluidic cartridge to minimize contamination. This design not only ensures rapid measurement of coagulation parameters (such as PT) with minimal reagent usage but also supports bedside testing and multiple replicates from a single blood sample. By refining these pre-analytical steps, the coagulometer lays the groundwork for more robust, point-of-care coagulation diagnostics—ultimately enabling faster clinical decision-making and advancing patient care in critical settings.

Role: BSc, Undergraduate Research Assistant, MNSL, Sharif University of Technology (Jun 2019 – Dec 2020)

Featuring permanent liquid electrodes housed within laser-cut microchannels to enable precise, transparent droplet manipulation. This configuration replaces conventional solid electrodes with a configurable electrolyte (KCl), supporting flexible substrate integration, minimal contamination, and consistent droplet control at lower voltages. Incorporating a sealed assembly of PMMA or polycarbonate films, temperature-stabilized layers, and a feedback-based circuit, the system achieves uniform actuation speeds and enhanced transparency compared to rigid PCB-based alternatives.

Role: BSc, Undergraduate Research Assistant, MNSL, Sharif University of Technology (Jun 2019 – Dec 2020)

Publication: Bahari, A.R., Abdar Esfahani, M. & Taghipoor, M. Transparent electrowetting-on-dielectric device with permanent liquid electrodes. Microfluid Nanofluid 27, 43 (2023). DOI Link

A cost‑effective, multi‑layer microfluidic device that utilizes a 3D H‑shaped architecture and xurography‑based fabrication to achieve significantly enhanced diffusion‑based separation. By stacking precisely cut adhesive and polymer layers, the filter expands the fluid–fluid interface—improving mass transfer, shortening diffusion pathways, and realizing up to sixfold greater extraction efficiency than conventional 2D H‑filters under the same flow conditions. This robust design supports a variety of chemical and biological applications, laying the groundwork for simpler, more adaptable lab‑on‑a‑chip systems that can be rapidly prototyped for both research and industrial needs.

Role: BSc, Undergraduate Research Assistant, MNSL, Sharif University of Technology (Jun 2019 – Dec 2020)

Publication: Bahari, A., Mirzaei, A. & Taghipoor, M. Cost-effective 3D H-filter fabricated by xurographic method. Microfluid Nanofluid 26, 70 (2022). DOI Link